You're committed to the DO from when you apply? Or can you make the call between MD and a separate degree after 1-2 years?

Something I hadn't thought about. I'll look for a way to get involved in some medical work this summer. Luckily have a family friend in head/neck surgery who's willing to let me shadow; also have a hospital on campus. Working in physics research turned into watching the world cup last summer. Didn't get much done.